Exhaust manifold



Jan. 3, 1928.

Q. s. ARMSTRONG EXHAUST MANIFOLD Filed March 24, 192-5 alike-awn Patented Jan 3,1928.

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' Application flYed March 24, 1925. Serial m. 17,974.

This invention relates to new improvements in exhaust manifold structures for internai combustion engines.

, An object of the invention resides in pro- 5 viding an exhaust manifold structure ha-ving a plurality of hollow veins or ribs formed integrally therewith, which extend longitudinally of the manifold structure, for in creasing the interior capacity of the mantfold, and providing a substantially hollow surface, to permitready radiation of heat.

A" further object of the invention is to provide a manifoldstructure having a plurality of vanes on the upper portion thereof extending longitudinally of the structure, in order to provide for a larger capacity in the interior of the manifold and for increased radiation of the heat therein, the manifold structure being formed with a pair of shoulders extending longitudinally of the central portion and at the base ofthe hollow rib, on which a suitable jacket may be seated when it is desired to utilize the radiated heat for heating the interior of the automobile body, to which the manifold may be applied, in a suitable manner.

The invention comprehends other objects and improvements in the details of construction,and' formation of the manifold, in order to permit the construction of the improved manifold at substantially the same cost. as for the well known types of manifolds now used, as more particularly pointed out in the following detailed description, and in [the claim directed to a preferred form of the invention, it being understood, however, that minor changes may bemade, -without departing from the spiritv and scope of the in.- s vention as described and claime 40 In the drawing, forming a part' of-this specification: Figure 1 is a side elevation of the improved manifold structure. igure 2 is a vertical transverse sectional view, taken on the line 2-2 of Figure 1. I

' While the manifold construction, forming the subject matter of the present invention .me be applied inthe construction of manifol generally used upon. internal combustion engines, the manifold, as illustrated in the drawing,'is designed particularly for 7 application to the well known Ford type ofengine, and compri the unitarycasting'l, whm'his rovided'wit depending hollow extensions at the pro r points having latera1 extensions 3 there? om, for-ent in the exhaust openings inthe side of the englne block. At the rear end portions, the castlng 1s provided with an outlet externally threaded as at 4, all of which structure so far described is of usual fcrm and now used in ,the construction of manifolds for internal combustion'engines. The upper portion of the manifold as illustrated in the drawing is provided with a .pair of vertically extending projections 5 arranged in spaced relation, and which are hollow, as indicated at ti, the

hollow portion 6 opening into the main interior portion ofthe manifold. This provides an additional capacity in the-interior of the manifold extending longitudinally thereof for the passage of exhaust gases through the threaded outlet 4 and it in addition provides a greater surface for the application of heat from the exhaust gases. These hollow projections provide a substan tially increased exterior surfacefor' the radiation of'the heat from the exhaust gases, which may beus'ed for heating the interior of the automobile body suitable means when desired. In this connection, a shoulder is provided at 7 extending longitudinally from the manifold, on opposite sides thereof,

which may be used for a seat for a suitable jacket forming a part of the heat conveying,

structure when it is desired to utilize the heat in the. exhaust manifold for An additional feature of the invention resides in'the fact that thecasting may enced in removing the patterns and replacing the parts of the mold for pouring the castings. This particular construction also v.

facilitates removin the sand core after the casting'iscomplete d. In this way, the casting can be made in the same time as the 'ordinary exhaust manifold casting and wlth substantially he same amount of'm'aterial, 1 st of production is not mso that the c creased. What is claimed is:-

As an article of manufactura an exhaust 'manifold, comprising a cast body formed of a lower substantially semi-cylindrical portion having a pluralityof depending tuany suitable PHI-1 ular extensions having the lower ends tera minating in lateral tubular. projections for engagement in the exhaust openings of an internal-combustion engine cylinder block,

the upper portion having a. pair of upwardly extendm relativel converging side walls provi ed with -0 set junctures .with the lower'portionofthe body to provide external. shoulders on opposite sides of the center portion of said manifold extending longitudinall thereof, and a -V-shaped portion formed etween saidside walls and in thereof formed of substantially uniform section,-- said side walls and V-shaped portions forming. a art of passages extending throughout, t e length. of said manifold above the connections for the manifold with the engine block for conducting the gases in said manifold longitudinally thereof gh lglough an outlet formed at one end of said 0 1 I1 1 testimony whereof I aflix my signature. I

:OBLANHG. ARMSTRQNG. 

